SSIS is a pretty useful tool for designing ETL processes, but one of the transformations I was disappointed with in 2005 was the lookup. It was a little better than the lookup functionality in DTS, ...

The Cache Transformation allows you to build up your lookup cache before you need it, saving you a step or two in the process. The Lookup transformation in SSIS has changed a lot in SQL Server 2008.

If we are dealing with a large amount of data, the lookup may be forced to do repetitive database queries creating a potential bottleneck. Now in SSIS 2008 there is a Caching Mode that defaults to ...